Calculations of the Thermal Conductivity of Porous Materials
In this paper, the geometrical effective thermal conductivity of porous materials is investigated based on two different approaches: the finite element method as a representative for numerical approximation methods and an analytical method for 2D homogenised models based on a solution of the respective boundary value problem. It is found that the relative conductivity is practically independent of the specific shape or topology of the inclusions. Only the morphology (closed-cell or open-cell) of the structure slightly influences the conductivity. Furthermore, it is shown that a small perturbation of the circular inclusions of 2D models increases the effective conductivity.
Paula Maria Vilarinho
T. Fiedler et al., "Calculations of the Thermal Conductivity of Porous Materials", Materials Science Forum, Vols. 514-516, pp. 754-758, 2006